It needs programing, but the mdrive from IMS is a good choice.
Also avaialble with linear screw going through the center of the motor.
www.imshome.com
If you want to program it use the MDI (Motion Control) or of you just want to slew at a known speed use the MDO (Speed Control)
Cost will be about $300, and this includes the motor, driver and motioncontroller all in one package.
They go from size 14 to 42.